Catalog: Duff Company Catalog
Company/Brand: Duff Company
pressure reducing valve in Duff Company Catalog by Duff Company
table of contents valves page 1 plumbing industrial ball ... flanged plug float solenoid and boiler valves hydrants floats petcocks and needle ... valves fittings pipe and tubing page 43 ... and strut fi re protection page 141 valves sprinklers fire stops grooved fittings ... page 155 t&s brass central brass powers valves symmons moen and delta faucets and ... parts commercial drains sloan valves parts and optima faucets tubular traps ... pumps dielectric fittings relief valves regulators vents thermometers boiler ... preventers and meters page 353 pressure reducing valves backflow preventers ... diaphragm centrifugal pool industrial pressure booster environmental and well pumps ... softeners filters media control valves and parts tanks resin chemical feed ... sewer and drain and corrugated pipe valves and fittings laboratory fixtures and ...

duff co operating life pressure drop valves butterfly valves butterfly valves can ... tight shut off there are not many valves that can take that kind of punishment ... energy costs go up with excessive pressure drop prevalent point to keep in mind ... the valve or valves are but one factor in a piping system ... that contribute to pressure drop of equal concern are these factors ... flow direction via fittings butterfly valve have flow characteristics three times ... better than globe valves and approximately 75 of an equivalent ... size gate valve butterfly valves can used for on/off service and ... as compared to a gate or globe valve butterfly valves have a wider range of ... saved with lightweight butterfly valves as compared to heavyweight cast iron ... valves ie a 10 butterfly valve may weigh 490 pounds this can be an ...

valves operational sequence pilot operated ... pilot orifice lifts off causing system pressure holding the diaphragm closed to drop as ... system pressure on top of the diaphragm is reduced full ... system pressure on the opposite side of the diaphragm ... allowing full media flow through the valve since the bleed orifice is ... small that th pilot orifice system pressure cannot rebuild on top of the diaphragm ... and covers the pilot orifice system pressure then builds orifice forcing the ... and stops media flow through the valve duff co types of solenoid-pilot ... normally open in a normally-open valve the sequence of operation is reversed ... from that of a normally closed valve the main orifice is open when the ... the pilot orifice causing system pressure holding the diaphragm closed to drop as ...

explains their use in extremely high pressure services particularly at or near ... developed for use on small-size high pressure piping their initial cost is about 10 ... used to blank off the ends of piping valves and pressure vessel openings from the ... standpoint of internal pressure and bolt loading blind flanges ... whether this results from high pressure of from sub-zero or elevated ... calculated strength under internal pressure is of the order of two-thirds that of ... comparable welding neck flanges their pressure-holding ability is little if any better than ...

duff co powers mixing valves plumbing fotoguard/fotopanel processing ... of the hydroguard thermostatic mixing valves 460 alarm the series 460 alarm ... is corrected series 420 thermostatic valves scalds or thermal shock hot or cold ... can result from pressure and/or temperature changes in the ... series 420 hydroguard thermosttic valves for single unit shower systems maintain ... user despite variations in inlet supply pressure or temperature a liquid filled ... less than 125o f series 2000/410 pressure equalizing valves sudden shower ... changes due to supply water inlet pressure changes are eliminated with the power ... series 2000 and 410 hydroguard pressure equalizing valves a diaphragm operated ... poppet immediately responds to any pressure change to maintain consistent pressures ...

900 series duff co concealed 4 port pressure balancing mixing valve for use in ... shower applications uses diaphragm type pressure balancing mechanism all internal parts ... -piping price fig no 59514 includes valve arm flange showerhead threaded ... concealed thermostatic water mixing valve for use on shower and tub/shower ... compensates for both temperature and pressure fluctuations a built-in adjustable ... trouble-free service t425 thermostatic valve 1/2 npt 3 port fig no price 47995 ... powers 420 series t426 thermostatic valve 1/2 npt 4 port fig no price 47997 ... compensates for both temperature and pressure changes in the supply lines and reduces ... flow upon water supply pressure failure features the dirt and lime ... strainer checkstops included with each valve prevents crossover and allows easy ...
model no manufacturer 13 is there a pressure reducing valve on dishwasher yes no ... per person average of a restaurant by reducing the figure used for the total number ...

heating vr8304 duff co honeywell gas valves vr8305 dual valve combination gas ... 36e36 -38 36c68 robertshaw 7200der same valve action and features as vr8304 but ... 415,000 gas natural vr8300 compact dual valve combinaiton gas control for standing ... 30,000 to 300,000 gas natural dual valve combination gas control for electronic ... 38 robertshaw 7100der solenoid operated valve operates on an off with thermostat call ... diaphragm operated valve opens under regulatr control closes if ... ignition this compact high capacity valve can be used to replace hundres of gas ... valves used in intermittent pilot hot surface ... ideal for service inventory the vr8345 valve fits even limited space applications ... ,000 to 300,000 gas natural vr8205 dual valve combination gas control for electronic ... control which combines manual valve two automatic singlestage operators ...

duff co heating taco zone valves taco zone valve each with its own taco ... maximum service life from taco zone valves heat anticipator is factory set to ... box all wiring is done at circulation reducing installation time fig no 50439 price ... 51754 price motortrol hydronic control valves two-way and three way fan coil valves ... for chilled water,hot water and low pressure steam applications 1/2 sweat fittings ... operation 100 shut off 300 psi system pressure taco transformer reduces line voltage ... when used in conjunction with taco zone valves ul listed and csa approved can handle ... up to 3 taco zone valves fig no 41059 price type type 2-way 2- ... 0654c0307ga00 price hydronic zone valves designed for baseboard applications ... quikonnekt fitting ideal replacement valve normally cosed operation with end ...

the extrol system includes a built-in valve and check valve for reducing supply ... water pressure and maintaining minimum system maximum ... working pressure 100psig maximum operating temperature ... size air purger required max working pressure 100 psig maximum operating pressure ... with your specifications price filltrol valve kit fig no 17797 extrol expansion tank ... heating and cooling systems max working pressure 100 psig max operating temp 240of ... air eliminator cast iron max working pressure 150 psig/max working temp 240of fig no ... /eliminator cast iron max working pressure 150 psig/max working temp 240of fig no ...

84156 36514 50056 62005 price braukman pressure regulating valve single union with ... 400 psi inlet 15-150 ips outlet flo valves b&g fb38 low pressure reducing valves ... equipped with a low inlet pressure check valve and removable strainer fig ... pattern size 3/4 fig no 62008 price reducing valve low pressure reducing valve is ... equipped with a low inlet pressure check valve and removable strainer it ... 3/4 fig no 41044 price no 6&7 high pressure reducing valves protects plumbing ... fixtures against excessive line pressures all wetted part are brass these valves ... with a removable strainer low inlet pressure check valve and extra large diaphragm ... to deliver 45 psi with 125 psi to the valve descr #6 #7 1/2 3/4 fig no 39100 ...

series duff co steam and water safety valves kunkle 252 series models 252-253 254 ... 6010-6021 6030 6221 6230 6238 fbf-fba pressure limits steam to 250 psig 406of air/gas ... intercoolers and after coolers pressure vessels containing steam air or ... receivers sterilizers and autoclaves pressure limits 250 psig 406of applications ... steam boilers and generators pressure reducing stations air/gas compressors ... reciprocating or rotary pressure vessels including tanks receivers ... hard to get settings kunkle pop safety valve liquid 0-300 psi 3/4 to 4 available ... your special pricing kunkle pop safety valve stainless steel for corrosive liquid ... now for your pricing kunkle pop safety valve high pressure liquid gas vapor carbon ...

price short stop with a short stop valve installed in a maid-omist 67 air vent ... water can flow around the extended valve mechanism into the vent when the air ... systems to remove air the nickel plated valve has a quick venting design and a ... fig no 41940 price fast venting air valve for steam c gorton vapor equalizing ... valve venting capacity equal to 15 ordinary ... type air valves on radiators farthest from the boiler ... and above d gorton vapor equalizing valve venting capacity equal to 27 ordinary ... type air valves in cases where a large amount of air ... -fired systems unless radiator supply valves are left on all the time for m a ste ... vented as required with just ounces of pressure varivalves can be adjusted to make ... no longer is there any need to build pressure to reach remote areas meanwhile ...

for steam of a medium liquid or gas by pressure reducing valve remotely sensing that ... medium s pressure reduction for numerous temperature and ... storage tanks small highly-versatile valve that heat exchangers fuel oil storage ... heaters offers a wide range of reduced pressures it provides steam tables open tank or ... dryers or ovens sterilizing equip pressure are fairly constant ment size rang fig ... no price balanced main valve for better temperature control of dial ... 55617 55618 55619 74792 74793 73875 pressure regulating valve single-seated ... steam water or any other tion fluid pressure in applications industrial plants ... hotels institutions etc controls pressure cialized type of pipe fitwhere the ... supply to valve remains constant for ting that is used ... medium the operation medium under pressure enters the size fig no price suction ...

watts u5b standard capacity water pressure reducing valve with integral strainer ... 1/2 through 2 suitable for initial pressure unless otherwise specified max temp ... in closed systems available low pressure range u5blp 10-35 set 30 lb 1/2 to 1 ... available high pressure range u5b hp range 75-100 set 90 size ... 3595 3651 3655 3661 duff co watts water pressure reducing valve watts 223 1/2 to 2 1/2 ... n223b 2 1/2 3 super capacity water pressure reducing valves with and without ... or industrial applications initial pressures up to 300 lbs reduced pressure range 25 ... -75 lbs set for 50 lbs delivery pressure unless otherwise specified npt female ... 160of bronze body available low pressure range 1 35 lbs set for 30 lbs unless ... otherwise specified available high pressure range 1/2 3/4 1 50-145 1 1/4 50-120 ...

examples type purpose 1 2 3 4 reduced pressure zone back two independent check valves ... supply lines with intermediate relief valve backpressure or back siphonage ... connections supplied with shut-off valves where there is a high potential lab ... health contamination and continuous pressure applicawaste digesters continuous ... pressure tion car washes reduced pressure detector assy high hazzard rpz valve ... -connections subject to double check valve assembly two independent check valves ... health contamination and continuous pressure applica checks are replaceable for ... repair testing continuous pressure tions main supply lines food cookers ... in by pass low hazzard line dual check valve backflow preventer for low hazard cross ... -connections continuous pressure applications specialty backflow ...

full port resilient seated bronze ball valve 175 psi 140of bronze body construction ... modular design replaceable seats ball valve test cocks easily serviced with no ... principal provides high capacity relief valve discharge during the emergency ... of combined back-siphonage and back pressure with both checks fouled epoxy coated ... cast iron check valve body with bronze seats 175 psi to 140of ... entrance two inline independent check valves with an intermediate relief valve ... /4 -3 4 -6 watts n36 vacuum relief valve for water service automatically vents a ... also suitable for steam service max pressure 15 psi size weight fig no price 1/2 3/ ... test kit for testing all reduced pressure zone backflow preventers accurate ... testing of zone and relief valve opening differential fouled check ...

backflowpreven ters-meters duff reduced pressure zone backflow preventers co rebuild ... zurn combraco febco hersey check valve kits when ordering please specify fig ... no and valve size fig no kit no first check kits ...
-backflowpreven ters-meters reduced pressure zone backflow preventers relief valve ... when ordering please specify fig no and valve size fig no relief valve rubber parts ... 85660 85661 85662 85663 relief valve total 64689 85665 85666 85667 total ...

pumps hydroservant i regulating valves nothing burns out a pump motor quicker ... red jacket s hydroservant i regulating valves eliminates this rapid-cycling condition ... of the pump to assure even water pressure hydroservant i assures far less cycling ... demand for water the pump cuts off when pressure reaches a predetermined level keeping ... constant pressure in the system when there is no water ... demand hydroservant ii regulating valves duff co for capacities from 30 to 300 ... gpm regulates pressure in larger capacity systems maintains ... constant pressure output cost less than pressure tank systems of equivalent size or ... air chamber with a sensitive pressure switch which activates the pump to ... maintain both pressure and volume the pump operates as long as ... up to 20 gpm provides constant water pressure ends pressure variations eliminates ...

electricity a nonconductor differential pressure the difference in pressure between two ... process of filtration element by-pass valve a valve within a filter to limit the ... differential pressure which can be impressed across the ... from clean unit to a predetermined pressure drop build up usually measured in ...

humidifying systems temperature control valves the hot/high pressure filter housings ... cap style is available standard cap no pressure relief no mounting bosses extra thick ... on a wide range of temperatures and/or pressures in addition these housings are ... vegetable oils high temperature/high pressure combination along with the excellent ... information call for our operating pressure vs temperature chart avoid use with ... make them an economical choice maximum pressure 125 psi maximum temperature 125of ... maximum pressure 200 psi maximum temperature 200of slim ... line black housings applications high pressure ro toluene/xylene hydraulic oil food ... them an ideal choice for various high pressure and corrosive applications caps are ... buna-n o-rings sold separately maximum pressure:200 psi maximum temperature:200of all ...

flow rates range up to 40 gpm with pressure drops as low as 1 psi the ... line clear blue clear red hot/high pressure black high pressure black valve-in-head ... clear valve-in-head big blue big blue natural polypro inlet ... description blue red hot/high pressure black high pressure big blue big blue ... 43439 45378 150135 price indicates pressure relief/bleed button on inlet side of ...
fins and coils small whisk type brush valve key utility knife 2 square operator nut ... x 6 for municipal water valves fig no 19777 42464 price blade only 5 ... fig no price 16212 mueller style water pressure testing gauge accurate and dependable ... used for ascertaining correct water pressure and to determine the proper selection ... and adjustment of relief valves regulators etc gauge is 2 1/2 dia with ... connection at top the spud fitted with pressure reducing bushing 0 lbs to 300 lbs fig ... no 50710 price water pressure testing gauge fig no 3695 price page ...
boiler surge instantly for high and low pressure steam boilers use 1 can for each 150, ... sludge frees and lubricates zone valves protects the pump by lubricating the ... clogging of automatic hot water valves frees and lubricates stuck flow valves ... recommended for both high and low pressure boilers fig no 16047 price all brass ... force suction pump pressure end force silverking into boilers ...